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Letters Patent 1% 66,260, dated July 2, 1867.

IMPROVEMENT IN PLQUGHS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JAMES B. SKINNEB, of Rockford, in the county of Winnebago, and State of Illinois, have invented certain new and useful Improvements in Ploughs, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, which make part of this specification.

,Goulters as heretofore constructed have been pivoted to a plough-beam in'such manner as to leave the coulter free to swing round without restraint. This rnethod of constructionl have found by experiment to be defective, as, in turning, the horses are liable to back into the coulter as it swings round and injure themselves, or in the case of gang-ploughs, the coulters, when lifted in turning, are apt to swing forward and out into the axle or other parts ofthe machine. e 3

Now it is the object of 'my'invention to obviate the above-named and other objections to the use of swivelling coulters and to this end the improvements herein claimed consist in so connecting a swivelling coulter to a plough-beam as to limit its lateral vibration and yet allow th'e c'oulter to adjusted both vertically and laterally ont-he beam. V i

In the accompanying drawings I have shown severalmodes of carrying out the object of my invention; each of the figures showings. different modification of my improvement; The plough-beam is shown in red in all the figures, and lettered A; in each figure a coulter, C, is supposed tobe pivoted to a swivelling bearing or caster-yoke, B, forming part of a spindle, b, as in Fig. 1. 1

Figure 1 shows the ca ter-yoke fitted on the square end of a horizontalspindle, oi 'betw een two cam planes or wedge-blocks 0 which limit its lateral vibration. The spindle is round and turns axially in half ronnd boxes pp, (to allow the coulter to move vertically,) which are supported under the beams by loops, 1), and a crossbar, I. The boxes can be' tightened 'on the beams by nuts and screws. The spindle O can be moved endwise in the boxes: to adjust the eoulter laterally.

Figure 2 shows a device similar to fig. 1, except that a loop, R, is formed on the end of the spindle, and thatthe caster-yoke plays laterally on a vertical pirnin the loop, the sides of the loop limiting the lateral play of the coulter. This device is valuable as it prevents the coulterfromwahbling on the spindle, the pin always keeping it vertical. I i

Figure 3 shows the caster-yoke arranged on a collar fitting on the end of a spindle, a, secured to a laterally adjustable slotted bracket plate, T; the coulter-y'oke being held at any desired elevation bya nut and screw on the end of the spindle. i a i j By allowing the coulter to swivel it is enabled to follow the movements of the beam with less friction, while by limiting its vibration I prevent it from turning se far as to injure the team or interfere with the working of the plough; while the facilities atforded 'by my invention for both vertical and lateral adjustments of the coulter enable me readily to adapt it to the varying conditions under which it is required to work.-

My improvements have been described as applied to arolling coulter; it. is, however, obvious that they areequally applicable to a curved cutting eoulter. 7

What I claim-as my invention, and desire to secure byLetters Patent, is-

1. The combination of the caster-yokewith the horizontal caster-spindle, as shown in fig. l.

2. The combination ofthe caster yoke with the horizontal caster-spindle by pivoting the yoke on a vertical pin in the loop on the spindle, as shown in fig. 2, for the, purpose of preventing wabbling of the coulter, and yet leave it free to vibrate laterally.

The eombination of the caster-yoke with the squared thimble turning on the fixed spindle projecting from the bracket-plate, as shown in fig. 3. I I

i 4. The combination, substantially as described, with thehorizontal caster-spindle O, of the. double half round boxes 12, (suspended in the loops p,) anda cross-bar, P, for the purposes set forth. In testimony whereof I have hereunto subscribed my name.

I I JAMES B. SKINNER. Witnesses:

WHEELER MEAD,

H. M. SKINNEB. 

